4 4.6 4.6.1 Single-axis controllers Wiring Important notes Stop! No device protection in the event of too high mains voltages The mains input is not fused internally. Possible consequences: ƒ Destruction of the device if the mains voltage is too high. Protective measures: ƒ Observe the max. permissible mains voltage. ƒ Fuse the device correctly on the supply side against mains fluctuations and voltage peaks. Stop! Overvoltage on components: On IT systems an earth fault in the installation can cause impermissible overvoltages. Possible consequences: Destruction of the device. Protective measures:
If the devices are operated on IT systems, the internal connection of the filters to the protective earth in the installation backplane has to be disconnected. Note! Switching operations on the motor side of the controller are permitted for safety switch-off (emergency off). Please observe: ƒ When the controller is enabled, switching operations may lead to a response of the controller monitoring functions. ƒ The switching elements on the motor side must be rated for DC voltages with U DCmax = 800 V. 4.6-2 EDS94SPP101 EN 3.1-04/2007